Description:
------------
When using the same binding id in a query the PDOStatement::execute()
method still requires you to specify the same amount of parameters.

Reproduce code:
---------------
<?php
$pdo = new PDO('pgsql:host=localhost dbname=bats user=user
password=pass');
$pdo->setAttribute(PDO_ATTR_ERRMODE, PDO_ERRMODE_EXCEPTION);

$statement = $pdo->prepare("
            UPDATE groups
            SET
               lft = CASE WHEN lft > :right
                     THEN lft + 2
                     ELSE lft END,
               rgt = CASE WHEN rgt >= :right
                     THEN rgt + 2
                     ELSE rgt END
            WHERE
              rgt >= :right
            ");
$statement->execute(array(':right' => 5));

?>

Expected result:
----------------
Would expect the statement to execute without issue.

Actual result:
--------------
PHP Fatal error:  Uncaught exception 'PDOException' with message
'SQLSTATE[08P01]: <<Unknown error>>: 7 ERROR:  bind message supplies 1
parameters, but prepared statement "pdo_pgsql_stmt_08257c0c" requires 3'
in /usr/home/wb/bats/scripts/tests/pdoQuery.php:17
Stack trace:
#0 /usr/home/wb/bats/scripts/tests/pdoQuery.php(17):
PDOStatement->execute(Array)
#1 {main}
  thrown in /usr/home/wb/bats/scripts/tests/pdoQuery.php on line 17

Using PDO-0.9 and PDO_PGSQL-0.9

Please try using this CVS snapshot:

  http://snaps.php.net/php5-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5-win32-latest.zip

It's not portable to rely on that.
You need to create three parameters and bind them separately.

Fair enougth.

I will submit a note to the php manual about this.

Keep up the good work :)